There are a number of books on a shelf. If one book is the 4th from the left and 6th from the right, how many books are on the shelf?

Before Mount Everest was discovered, what was the highest mountain in the world?

Analyze and find the missing item in the sequence:
16, 06, 68, 88, __, 98

On a bus, there is a 26-year-old pregnant lady.
A 30-year-old policeman.
A 52-year-old random woman.
And the 65-year-old driver.

Who is the youngest?

A Car is crossing a bridge 2 miles long. The bridge can only hold 10000 lbs, which is the exact weight of the car. The Car makes it half way across the bridge and stops. A bird lands on the car. Does the bridge collapse? Explain.

A girl was standing near the window thinking something. All of a sudden she decides something and throws something out of the window. She dies very soon after throwing it. She was perfectly healthy and had no disease or allergy. No one killed her and she did not commit suicide.

Can you think of any possible explanation that is logical as well for what happened there?

What's the only room from which no one can enter or leave

I know a nine-letter word having only one vowel.
Do you ?

As you can see that fifteen matches have been used to form an arrangement. What you have to do is remove any six of them to make them ten.

The measurement of time, That can't be found on a clock, But can be looked upon on a map.

Who is He ?